16682987 has 4 divisors (see below), whose sum is σ = 16693320. Its totient is φ = 16672656.

The previous prime is 16682971. The next prime is 16682993. The reversal of 16682987 is 78928661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16682987 - 2⁴ = 16682971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16682927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162 + ... + 6167.

It is an arithmetic number, because the mean of its divisors is an integer number (4173330).

Almost surely, 2^16682987 is an apocalyptic number.

16682987 is a deficient number, since it is larger than the sum of its proper divisors (10333).

16682987 is an equidigital number, since it uses as much as digits as its factorization.

16682987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10332.

The product of its digits is 290304, while the sum is 47.

The square root of 16682987 is about 4084.4812400108. The cubic root of 16682987 is about 255.5198264339.

The spelling of 16682987 in words is "sixteen million, six hundred eighty-two thousand, nine hundred eighty-seven".